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Ortega-Lepe I, Sánchez P, Santos LL, Lara P, Rendón N, López-Serrano J, Salazar-Pereda V, Álvarez E, Paneque M, Suárez A. Catalytic Nitrous Oxide Reduction with H 2 Mediated by Pincer Ir Complexes. Inorg Chem 2022; 61:18590-18600. [PMID: 36346983 PMCID: PMC10441893 DOI: 10.1021/acs.inorgchem.2c02963] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Indexed: 11/09/2022]
Abstract
Reduction of nitrous oxide (N2O) with H2 to N2 and water is an attractive process for the decomposition of this greenhouse gas to environmentally benign species. Herein, a series of iridium complexes based on proton-responsive pincer ligands (1-4) are shown to catalyze the hydrogenation of N2O under mild conditions (2 bar H2/N2O (1:1), 30 °C). Among the tested catalysts, the Ir complex 4, based on a lutidine-derived CNP pincer ligand having nonequivalent phosphine and N-heterocyclic carbene (NHC) side donors, gave rise to the highest catalytic activity (turnover frequency (TOF) = 11.9 h-1 at 30 °C, and 16.4 h-1 at 55 °C). Insights into the reaction mechanism with 4 have been obtained through NMR spectroscopy. Thus, reaction of 4 with N2O in tetrahydrofuran-d8 (THF-d8) initially produces deprotonated (at the NHC arm) species 5NHC, which readily reacts with H2 to regenerate the trihydride complex 4. However, prolonged exposure of 4 to N2O for 6 h yields the dinitrogen Ir(I) complex 7P, having a deprotonated (at the P-arm) pincer ligand. Complex 7P is a poor catalytic precursor in the N2O hydrogenation, pointing out to the formation of 7P as a catalyst deactivation pathway. Moreover, when the reaction of 4 with N2O is carried out in wet THF-d8, formation of a new species, which has been assigned to the hydroxo species 8, is observed. Finally, taking into account the experimental results, density functional theory (DFT) calculations were performed to get information on the catalytic cycle steps. Calculations are in agreement with 4 as the TOF-determining intermediate (TDI) and the transfer of an apical hydrido ligand to the terminal nitrogen atom of N2O as the TOF-determining transition state (TDTS), with very similar reaction rates for the mechanisms involving either the NHC- or the P-CH2 pincer methylene linkers.
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Affiliation(s)
- Isabel Ortega-Lepe
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Práxedes Sánchez
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Laura L. Santos
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Patricia Lara
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Nuria Rendón
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Joaquín López-Serrano
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Verónica Salazar-Pereda
- Área
Académica de Químicas, Universidad
Autónoma del Estado de Hidalgo, 42184 Mineral de la Reforma, Hidalgo, Mexico
| | - Eleuterio Álvarez
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Margarita Paneque
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Andrés Suárez
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
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Teerasong S, Praditweangkum W, Chompoosor A. A new mechanism for resonance Rayleigh scattering detection of minoxidil based on catalytic oxidation of silver nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 275:121147. [PMID: 35306307 DOI: 10.1016/j.saa.2022.121147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/03/2022] [Accepted: 03/11/2022] [Indexed: 06/14/2023]
Abstract
This work presents a new method for minoxidil detection based on silver nanoparticle (AgNP) oxidation. Minoxidil, which is a pyrimidine N-oxide, can be reduced to its corresponding pyrimidine via a redox reaction. In this system, acetate buffer serves as a proton source. AgNPs act as electron donors that contribute electrons to the reaction, producing Ag+. Consequently, the sizes and numbers of AgNPs in the system decrease, which results in a decline in their resonance Rayleigh scattering (RRS). By monitoring the RRS intensity at 409 nm, a change in intensity was linearly related to the minoxidil concentration over a concentration range of 0.5 - 5.0 mM. The detection limit was 0.35 mM. This approach is simple and rapid. It is done by directly mixing the drug and AgNPs in an acidic buffer. The reaction was completed within 2 min. This proposed method was successfully utilized for quantification of minoxidil in topical hair-growth formulations.
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Affiliation(s)
- Saowapak Teerasong
- Department of Chemistry and Applied Analytical Chemistry Research Unit, School of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand; Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Thailand.
| | - Wiboon Praditweangkum
- Department of Chemistry and Applied Analytical Chemistry Research Unit, School of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand
| | - Apiwat Chompoosor
- Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand
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Singh J, Patel RI, Sharma A. Visible‐Light‐Mediated C‐2 Functionalization and Deoxygenative Strategies in Heterocyclic
N
‐Oxides. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jitender Singh
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247667 India
| | - Roshan I. Patel
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247667 India
| | - Anuj Sharma
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247667 India
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Molinillo P, Lacroix B, Vattier F, Rendón N, Suárez A, Lara P. Reduction of N 2O with hydrosilanes catalysed by RuSNS nanoparticles. Chem Commun (Camb) 2022; 58:7176-7179. [PMID: 35670417 DOI: 10.1039/d2cc01470j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of RuSNS nanoparticles, prepared by decomposition of Ru(COD)(COT) with H2 in the presence of an SNS ligand, have been found to catalyse the reduction of the greenhouse gas N2O to N2 employing different hydrosilanes.
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Affiliation(s)
- Pablo Molinillo
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica, and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC and Universidad de Sevilla. Avda. Américo Vespucio 49, 41092 Sevilla, Spain.
| | - Bertrand Lacroix
- Department of Material Science and Metallurgic Engineering, and Inorganic Chemistry, University of Cádiz, Spain.,IMEYMAT: Institute of Research on Electron Microscopy and Materials of the University of Cádiz, Spain
| | - Florencia Vattier
- Instituto de Ciencia de Materiales de Sevilla, CSIC-Universidad de Sevilla. Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Nuria Rendón
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica, and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC and Universidad de Sevilla. Avda. Américo Vespucio 49, 41092 Sevilla, Spain.
| | - Andrés Suárez
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica, and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC and Universidad de Sevilla. Avda. Américo Vespucio 49, 41092 Sevilla, Spain.
| | - Patricia Lara
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica, and Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC and Universidad de Sevilla. Avda. Américo Vespucio 49, 41092 Sevilla, Spain.
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Jin X, Lou Y, Zhang X, Wang B, Zhu Y, Gu X, Ding S, Ma J. Broccoli-liked silver phosphate nanoparticles supported on green nanofiber membrane for visible-light driven photodegradation towards water pollutants. NANOTECHNOLOGY 2022; 33:185703. [PMID: 35073520 DOI: 10.1088/1361-6528/ac4e42] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
In view of the practical application, it is imperative to develop efficient, exercisable, and visible light driven water pollution treatment materials. Herein, a high-efficiency green photocatalytic membrane for water pollution treatment is proposed and fabricated conveniently. Firstly, silver phosphate (Ag3PO4) nanoparticles with controlled morphology were prepared by simple liquid-phase precipitation method, and then a hierarchical structured Ag3PO4@polylactic acid (PLA) composite nanofiber membrane was prepared by electrospinning. Using electrospun PLA nanofiber membrane as a carrier of photocatalysts can significantly improve the dispersion of Ag3PO4nanoparticles, and increase the contact probability with pollutants and photocatalytic activity. The prepared PLA@Ag3PO4composite membrane was used to degrade methylene blue (MB) and tetracycline hydrochloride (TC) under visible light irradiation. The results showed that the removal ratio of pollutants on Ag3PO4@PLA composite nanofiber membrane was 94.0% for MB and 82.0% for TC, demonstrating an outstanding photocatalytic activity of composite membrane. Moreover, the PLA nanofiber membrane is a self-supported and biodegradable matrix. After five cycles, it can still achieve 88.0% of the initial photocatalytic degradation rate towards MB, showing excellent recyclability. Thus, this composite nanofiber membrane is a high-efficiency and environmental-friendly visible light driven water pollution treatment material that could be used in real applications.
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Affiliation(s)
- Xu Jin
- School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China
| | - Yaoyuan Lou
- School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China
| | - Xiuqin Zhang
- School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China
- Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China
| | - Bin Wang
- School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China
- Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China
| | - Yanlong Zhu
- School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China
| | - Xiaoxia Gu
- School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China
| | - Shanshan Ding
- School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China
| | - Jiayu Ma
- School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People's Republic of China
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Landman IR, Fadaei-Tirani F, Severin K. Nitrous oxide as a diazo transfer reagent: the synthesis of triazolopyridines. Chem Commun (Camb) 2021; 57:11537-11540. [PMID: 34664049 DOI: 10.1039/d1cc04907k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nitrous oxide is a potential diazo transfer reagent, but its applications in organic chemistry are scarce. Here, we show that triazolopyridines and triazoloquinolines are formed in the reactions of metallated 2-alkylpyridines or 2-alkylquinolines with N2O. The reactions can be performed under mild conditions and give synthetically interesting triazoles in moderate to good yields.
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Affiliation(s)
- Iris R Landman
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Farzaneh Fadaei-Tirani
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Kay Severin
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
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